"Tom Watson" wrote in message
...
There have been a number of responses so far, many of which reference
the "skin effect" - why the hell do we continue to produce wire that
has a core of the same conductive capacity as the surface, at great
cost, when we might manufacture a wire of a cheaper core material,
with the surface conductor at optimum.?

In high frequency situations we don't Tom. Conductors for such things as
radio towers are often hollow core conductors.


--

-Mike-